× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
a
5
k
5
c
5
B
5
l
5
C
4
s
4
a
4
t
4
i
4
r
4
r
4
Home Q & A Board Science-Related Homework Help Physics
New Topic  
lemonsplk lemonsplk
wrote...
Posts: 42
Rep: 0 0
11 years ago
Cu2+ + 2e- == Cu

Cu = 63.9 grams/mol

1amp= 1 coulomb/sec
1 faraday = 96,485 coulombs
Read 4542 times
1 Reply

Related Topics

Replies
wrote...
#1
11 years ago
Reduction equation:
Cu^2+(aq) + 2e- -------> Cu(s)

Mole of Cu to be plated: 2.08 g / 63.9 g/mol = 0.0325 mol
To reduce 1 mol Cu^2+ , 2 moles of electron are rquired.
To reduce 0.0325 mol Cu^2+, 2x0.0325 = 0.065 mol electron is required.
1 mol e- carries a charge of 1 faraday, or 96485 coulombs.
0.065 mol e- carries 0.065 x 96485 = 6271.5 coulombs

Ampere = Coulomb / sec
Second = Coulomb / Ampere = 6271.5 / 1.26 = 4977.4 sec

4977.4 sec / 60 sec/min = 82.95 or 83 min
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1391 People Browsing
 131 Signed Up Today
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Related Images
  
 278
  
 1078
  
 331
Your Opinion
Who will win the 2024 president election?
Votes: 3
Closes: November 4
Previous poll results: What's your favorite funny biology word?